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Automatic exposure control method and electronic device using same

A technology of automatic exposure and control method, which is applied in TV, electrical components, color TV, etc., and can solve problems such as screen flickering and not too large difference

Active Publication Date: 2021-01-05
REALTEK SEMICON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limitation is that the difference between the weight values ​​corresponding to different brightness thresholds should not be too large, otherwise the screen will flicker due to the back and forth adjustment of the brightness

Method used

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  • Automatic exposure control method and electronic device using same
  • Automatic exposure control method and electronic device using same
  • Automatic exposure control method and electronic device using same

Examples

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Embodiment Construction

[0016] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. Like numbers indicate like components throughout the drawings.

[0017] [One embodiment of automatic exposure control method]

[0018] The automatic exposure control method provided in this embodiment is applicable to electronic devices with a photography function, such as mobile phones, tablet computers, monitoring devices, etc. Generally speaking, the automatic exposure control method provided by this embodiment can dynamically provide a weight array for adjusting t...

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Abstract

The invention relates to an automatic exposure control method and an electronic device using the same. The automatic exposure control method comprises the following steps: step a, obtaining a cut pre-view image into a plurality of blocks; B, sorting the blocks according to the brightness, and calculating the weighted average brightness of the pre-view image according to the sorting of the blocks and a preset weight array so as to perform automatic exposure to obtain an automatic exposure image; C, judging whether the overexposure proportion or the over-darkness proportion in the brightness histogram of the automatic exposure image falls into an expected interval or not so as to determine whether a correction weight array is generated or not; D, according to a preset weight array or a correction weight array and the sequence of the blocks, calculating the weighted average brightness of the pre-view image, and carrying out automatic exposure to obtain a target automatic exposure image; And e, judging whether the total brightness of the target automatic exposure image is in an expected brightness interval or not to decide to control the electronic device to photograph or continue to finely adjust the preset weight array or correct the weight array.

Description

technical field [0001] The present invention relates to an automatic exposure control method and an electronic device using the same, in particular to an automatic exposure control method capable of dynamically adjusting brightness weight values ​​and an electronic device using the same. Background technique [0002] As far as the current common automatic exposure control method is concerned, when calculating the brightness of the screen block, the common way to set the brightness weight is to make the weights of each screen block equal, and to make the weight allocated to the block in the middle of the screen the largest. , Sort the blocks according to the brightness and assign different weights. However, in these practices, the weight values ​​are fixed values. [0003] In the case that all blocks are given a weight and the weight value is a fixed preset value, when there are too bright or too dark objects appearing in the screen and the proportion of the screen is not la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232H04N5/235
Inventor 纪雅文陈世泽
Owner REALTEK SEMICON CORP
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